<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style>
body { font-family: Verdana; font-size: 12px; line-height: 1.5; }
a { color: #000; text-decoration: none; }
a:hover { color: #F00; }
#menu { width:500px; height:28px; margin:0 auto; border-bottom:3px solid #E10001;}
#menu ul { list-style: none; margin: 0px; padding: 0px; }
#menu ul li { float:left; margin-left:2px;position: relative;}
#menu ul li a { display:block; width:87px; height:28px; line-height:28px; text-align:center; background:url(../img/b3.png) 0 -28px no-repeat; font-size:14px;}
#menu ul li a:hover { background:url(../img/b3.png) 0 -56px no-repeat;}
#menu ul li a#current { background:url(../img/b3.png) 0 0 no-repeat; font-weight:bold; color:#fff;}
#menu ul li ul{position: absolute;top: -10px;left: -1px;display: none;}
#menu ul li:hover ul{position: absolute;top: 31px;left: -1px;display: block;}
</style>
</head>
<body>
  <div id="menu">
  <ul>
  <li><a href="@#" id="current">首页</a></li>
  <li>
    <a href="@#">网页版式</a>
    <ul>
      <li><a href="#">自适应宽度</a></li>
      <li><a href="#">固定宽度</a></li>
      <li><a href="#">新手入门</a></li>
      <li><a href="#">视频教程</a></li>
      <li><a href="#">常见问题</a></li>
    </ul>
  </li>
  <li><a href="@#">div+css</a>

    <ul>
      <li><a href="#">自适应宽度</a></li>
      <li><a href="#">固定宽度</a></li>
      <li><a href="#">新手入门</a></li>
      <li><a href="#">视频教程</a></li>
      <li><a href="#">常见问题</a></li>
    </ul>
  </li>
  <li><a href="@#">div+css</a></li>
  <li><a href="@#">常用代码</a></li>
  </ul>
  </div>
</body>
</html>
